Simple and raw tutorial (without audio) showing how to use the UserExport Mediawiki extension to export Mediawiki users to a CSV file and import them to Tikiwiki.
The extension page is http://www.mediawiki.org/wiki/Extension:UserExport
This video is part of the collection to show how to import a Mediawiki site to Tikiwiki. For more information see http://doc.tikiwiki.org/Mediawiki+Importer